Improvement in low-water indicators



ATTnnNEYs.

Q SSS Patented May 4,1875

"WE T03:

' 1. H. Sno-wu, Lnw-Wate'r Indicator.

' THE GRAPHIC C0.PHOT0:LITH.39L4I PARK PLACEJLY.

VII/IIA rnrVlI/l/l/Il JAMES HARDING BROWN, OF PORTERS MILLS, WISCONSIN.

IMPROVEMENT IN LOW-WATER INDICATORS.

Specification forming part of Letters Patent No. 162,795, dated May 4,i875; application filed I February 20,1875.

To all whom t may concern Beit known that I, JAMES H. BROWN, of PortersMills, in the county of Eau Claire and State of Wisconsin, have inventeda new and useful Improvement in Combined Water- Gage, Pump-Regulator,and Alarm, of which the following is a specification:

Figure l is a side view of my improved device, parts being broken awayto show the construction. Fig. 2 is a top view of the same, part beingbroken away to show the construction.

`Similar letters of reference indicate corresponding parts.

My invention has for its object to furnish an improved water-gage forsteam-boilers, which shall be provided with a governor for regulatingthe supply of water and thus keeping the water always at the same level,which shall be provided with an alarm-whistle, to give an alarm when thewater rises to highwater mark, or sinks to low-water mark, which shallbe free from gearing upon the inside, and thus not liable to stick orwork hard, and which shall be simple in construction, not liable to getout of order, and easily adjusted.

The invention will rst be fully described,

and then pointed out in the claim.

A represents the case of the gage, which is made somewhat pear or wedgeshape, and is placed with its bottom .about upon a level with the'upperflues of the boiler. With the bottom of the case A is connected a pipe,B, which is designed to enter the boilerhead below the ues, and thusavoids all foam. The water-pipe B is provided with a blow-off valve, b',to enablethe case A to be easily cleaned out when necessary. With thetop of the case B is connected a pipe, C, which is designed to enter thedome of the boiler and admit steam to the said case A, so that the watermay always stand at the same level in the case A, and in the boiler.Within the case A is placed a tapering float, D, which correspondssomewhat in form with the form of the said case A. The smaller end ofthe float D is rigidly connected with the shaft E, that crosses thesmaller part of the case A, and works in stuffing-boxes in the walls ofsaid case A. To one end of the shaft Eis attached an index linger orpointer, F, the point of which moves along an index-plate or scale,'f,attached to the case A, so as to indicate the exact level at which thewater stands in the boiler. To the other end of the shaft E is attacheda cross-bar, G. To one arm of the cross-bar G is pivoted the lower endof a connecting-rod, H, the upper end of which is pivoted to the outerend of the crank-arm I, attached to the stem of the throttle-valve J,placed in the steam-pipe K, that leads from the boiler to the steam-pumpthat supplies the said boiler with water. The connecting-rod H is madein two parts, the adjacent ends of which overlap .and are s'ecured toeach other by a bolt or other suitable means,A so that the length of thesaid rod H may be adjusted, as may be required. With the steam-pipe K isconnected the end of a pipe, L, with the other end of which is connecteda steam-whistle, M. With the valve-stem N of the valve that admits steamto the whistle M are attached the ends of two chains, O, the other endsof which are attached to the cross-bar G upon the opposite sides of andequally distant from the pivoting-point of said cross-bar. The chains 0are made of such a length that when the water in the gage rises above orsinks below certain fixed limits, one or the other of said chains O willbe drawn taut, and will operate the valve-stem, to admit steam to thewhistle M, and thus sound an alarm. The shaft E is kept fromlongitudinal movement by a yoke, P, attached to the case A, or someother suitable support, and the ends of which are notched to litvandride upon the said shaft.

By this construction, should the water rise or sink in the boiler itwill be indicated by the index F, and at the same time the valve J willbe operated to diminish or increase the amount of steam passing to thesteam-pump, and thus diminish or increase the amount of water throwninto the boiler.

Should the water in the boiler rise above high-watermark, or sink belowlow-water mark, the whistle will be sounded to call attention to theboiler.

Having thus described my invention, I from the pipe K, that suppliessteam to the ela-im as new and desire to secure by Letters steam-pump,substantially as herein shown Patentand described.

The combination of the two chains O and JAMES HARDING BROWN. thecross-bar G with the shaft E of the Witnesses: gage-float D, and withthe stem N of the JOHN J.WYATT,

valve that admits steam to the whistle M P. A. PRINCE.

